Discharge lamp lighting device

Abstract

A discharge-lamp lighting device has a housing with a power supply socket formed therein and accommodating a printed circuit board with a coil case having a primary coil formed by plural parallel plate-conductors insert-molded around the body thereof and a discharge lamp socket integrally fitted thereon and including a secondary coil therein. A lamp lighting circuit is formed by mounting the coil case on the printed circuit board. The discharge lamp lighting device is formed as a single solid device by potting all the components in the housing with insulating resin poured in a melted state and solidified therein, thus eliminating the need of providing a high-voltage cable between the circuitry and the lamp socket.

What is claimed is: 
     
       1. A discharge lamp lighting device having a housing with a power supply socket integrally formed therein and accommodating therein a discharge-lamp lighting-circuit assembly comprising a printed circuit board with wiring patterns and circuit components comprising a lamp lighting circuit thereon, a coil case mounted on the printed circuit board and connected to said lamp lighting circuit, said coil case having a primary coil formed by plural plate-conductors formed in parallel to each other at an outer surface of said coil case and a discharge lamp socket integrally formed on said coil case, a secondary-coil wound bobbin with a core inserted in a hollow center of said bobbin, wherein said discharge-lamp lighting-circuit assembly is mounted in said housing with a top portion of said discharge lamp socket projecting from an open-end of said housing and is connected at an output terminal of said coil case to said power supply socket formed in said housing and potted in said housing with insulating resin poured in a melted state and solidified therein to form a single solid device. 
     
     
       2. A discharge lamp lighting device comprising, a housing with a power supply socket integrally formed therein, a discharge-lamp lighting circuit assembly having a printed circuit board with wiring patterns and circuit components forming a discharge lamp lighting circuit, a coil case having a plurality of U-shaped plate-conductors positioned in parallel and mounted in said coil case, a discharge lamp socket integrally formed on said coil case, a secondary-coil wound bobbin with a core inserted in a hollow center of said bobbin mounted in said coil case inside of said plate-conductors, said coil case mounted on the printed circuit board and connected to said lamp lighting circuit, and said discharge-lamp lighting circuit assembly and said coil case being installed and permanently mounted in said housing. 
     
     
       3. A discharge lamp lighting device according to claim 2, wherein said printed circuit board includes parallel flat conductors connected to said plate-conductors mounted in said coil case and forming a primary-coil surrounding said secondary-coil wound bobbin. 
     
     
       4. A discharge lamp lighting device according to claim 3, wherein said printed circuit board includes holes at ends of said flat conductors for receiving terminal pins integrally provided on ends of said plate-conductors. 
     
     
       5. A discharge lamp lighting device according to claim 4, wherein said discharge lamp socket is provided with a high-voltage terminal for connecting a discharge lamp on one side and for engaging and electrically connecting to said secondary-coil on another side. 
     
     
       6. A discharge lamp lighting device according to claim 2, wherein said discharge lamp socket is provided with a high-voltage terminal for connecting a discharge lamp on one side and for engaging and electrically connecting to said secondary-coil on another side. 
     
     
       7. A discharge lamp lighting device according to claim 2, wherein said secondary-coil bobbin with said core, said printed circuit board and said coil case are integrally potted together in said housing by resin.